Merchants Dormant in March

SQL practice question · Easy · Subqueries & CTEs · American Express

Find merchants with no card transaction in March 2026 (2026-03-01 to 2026-03-31). Note: some transactions have a NULL merchant_id (unmatched terminals). Return merchant_id and merchant_name. Order by merchant_id.

Table: merchants

Schema of merchants
ColumnType
merchant_idINTEGER
merchant_nameTEXT
cityTEXT
Sample rows of merchants
merchant_idmerchant_namecity
1Cafe BrewMumbai
2Book NookDelhi
3Fuel StopPune
4Gadget HubJaipur
5Shoe BoxDelhi

Table: card_txns

Schema of card_txns
ColumnType
txn_idINTEGER
merchant_idINTEGER
txn_dateDATE
amountREAL
Sample rows of card_txns
txn_idmerchant_idtxn_dateamount
112026-03-02250
222026-02-27900
332026-03-311500
422026-04-01300
552026-03-151200
Expected output on the sample data
merchant_idmerchant_name
2Book Nook
4Gadget Hub

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